Add missing regions

Author: chriscerie

src/regions.ts

@@ -10,6 +10,8 @@ export const standardRegions: string[] = [
   'ap-southeast-2',
   'ap-southeast-3',
   'ap-southeast-4',
+  'ap-southeast-5',
+  'ap-southeast-7',
   'ca-central-1',
   'ca-west-1',
   'cn-north-1',
@@ -25,6 +27,7 @@ export const standardRegions: string[] = [
   'il-central-1',
   'me-central-1',
   'me-south-1',
+  'mx-central-1',
   'sa-east-1',
   'us-east-1',
   'us-east-2',